I have 5 pre-ban 30rd magazines. These are GI mags. Some still have tape and 550 cord on them, but I did look underneath the tape to be absolutely sure they are indeed pre-ban. These are undated.
Various manufacturers: 1 FN, 1 Parsons, 1 Adventureline. These all have black followers. All appear to be in decent used condition. I might have a green follower laying around here if that’s important to you.
ETA: 3 mags remaining.
$30 each plus $5 shipping. If you want the last 3, I’ll pay the shipping.